package com.android.core.utils.glide;

import android.content.Context;  
import android.graphics.Bitmap;  
import android.graphics.BitmapShader;  
import android.graphics.Canvas;  
import android.graphics.Paint;  
  
import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;  
import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;  
  
/** 
 * Description: 
 * User: chenzheng 
 * Date: 2016/8/31 0031 
 * Time: 15:42 
 */  
public class GlideCircleTransform extends BitmapTransformation {  
    public GlideCircleTransform(Context context) {  
        super(context);  
    }  
  
    @Override protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {  
        return circleCrop(pool, toTransform);  
    }  
  
    private static Bitmap circleCrop(BitmapPool pool, Bitmap source) {  
        if (source == null) return null;  
  
        int size = Math.min(source.getWidth(), source.getHeight());  
        int x = (source.getWidth() - size) / 2;  
        int y = (source.getHeight() - size) / 2;  
  
        // TODO this could be acquired from the pool too  
        Bitmap squared = Bitmap.createBitmap(source, x, y, size, size);  
  
        Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888);  
        if (result == null) {  
            result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);  
        }  
  
        Canvas canvas = new Canvas(result);  
        Paint paint = new Paint();  
        paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));  
        paint.setAntiAlias(true);  
        float r = size / 2f;  
        canvas.drawCircle(r, r, r, paint);  
        return result;  
    }  
  
    @Override public String getId() {  
        return getClass().getName();  
    }  
}  
